We have recently beefed up our webpage on the Covenant of Grace. Here you will find 30+ puritan treatises on the subject. We will add more in the future.
There is much blessing to be found in this rich literature on God’s Covenant for those who have a tender spirit before their God and treasure his promises:
“The secret of the Lord is with them that fear Him; and He will show them his covenant.”
Ps. 25:14